21111011201010 has 32 divisors (see below), whose sum is σ = 50667414347520. Its totient is φ = 5629493268608.

The previous prime is 21111011200997. The next prime is 21111011201041. The reversal of 21111011201010 is 1010211011112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5286555 + ... + 8376734.

It is an arithmetic number, because the mean of its divisors is an integer number (1583356698360).

Almost surely, 2^{21111011201010} is an apocalyptic number.

21111011201010 is an abundant number, since it is smaller than the sum of its proper divisors (29556403146510).

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

21111011201010 is a wasteful number, since it uses less digits than its factorization.

21111011201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13714802.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21111011201010 its reverse (1010211011112), we get a palindrome (22121222212122).

The spelling of 21111011201010 in words is "twenty-one trillion, one hundred eleven billion, eleven million, two hundred one thousand, ten".