91010102010 has 32 divisors (see below), whose sum is σ = 218432944512. Its totient is φ = 24268393920.

The previous prime is 91010101981. The next prime is 91010102017. The reversal of 91010102010 is 1020101019.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (91010102017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025112 + ... + 1110348.

It is an arithmetic number, because the mean of its divisors is an integer number (6826029516).

Almost surely, 2^91010102010 is an apocalyptic number.

91010102010 is an abundant number, since it is smaller than the sum of its proper divisors (127422842502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91010102010 is a wasteful number, since it uses less digits than its factorization.

91010102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120838.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 91010102010 its reverse (1020101019), we get a palindrome (92030203029).

The spelling of 91010102010 in words is "ninety-one billion, ten million, one hundred two thousand, ten".