10102201210021 has 2 divisors, whose sum is σ = 10102201210022. Its totient is φ = 10102201210020.

The previous prime is 10102201209953. The next prime is 10102201210039. The reversal of 10102201210021 is 12001210220101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8227081787521 + 1875119422500 = 2868289^2 + 1369350^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102201210021 - 2²⁵ = 10102167655589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10102201209983 and 10102201210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10102201210081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051100605010 + 5051100605011.

It is an arithmetic number, because the mean of its divisors is an integer number (5051100605011).

Almost surely, 2^{10102201210021} is an apocalyptic number.

It is an amenable number.

10102201210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102201210021 is an equidigital number, since it uses as much as digits as its factorization.

10102201210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10102201210021 its reverse (12001210220101), we get a palindrome (22103411430122).

The spelling of 10102201210021 in words is "ten trillion, one hundred two billion, two hundred one million, two hundred ten thousand, twenty-one".