1211100994 has 16 divisors (see below), whose sum is σ = 1878771456. Its totient is φ = 584917200.

The previous prime is 1211100991. The next prime is 1211100997. The reversal of 1211100994 is 4990011121.

It is an interprime number because it is at equal distance from previous prime (1211100991) and next prime (1211100997).

It is not an unprimeable number, because it can be changed into a prime (1211100991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15489 + ... + 51595.

It is an arithmetic number, because the mean of its divisors is an integer number (117423216).

Almost surely, 2^1211100994 is an apocalyptic number.

1211100994 is a deficient number, since it is larger than the sum of its proper divisors (667670462).

1211100994 is a wasteful number, since it uses less digits than its factorization.

1211100994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36681.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1211100994 is about 34800.8763395406. The cubic root of 1211100994 is about 1065.9253403495.

The spelling of 1211100994 in words is "one billion, two hundred eleven million, one hundred thousand, nine hundred ninety-four".