21110023021010 has 128 divisors (see below), whose sum is σ = 50769982255104. Its totient is φ = 6123572040960.

The previous prime is 21110023020991. The next prime is 21110023021039. The reversal of 21110023021010 is 1012032001112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15452612 + ... + 16763151.

It is an arithmetic number, because the mean of its divisors is an integer number (396640486368).

Almost surely, 2^{21110023021010} is an apocalyptic number.

21110023021010 is an abundant number, since it is smaller than the sum of its proper divisors (29659959234094).

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

21110023021010 is a wasteful number, since it uses less digits than its factorization.

21110023021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32215848.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21110023021010 its reverse (1012032001112), we get a palindrome (22122055022122).

The spelling of 21110023021010 in words is "twenty-one trillion, one hundred ten billion, twenty-three million, twenty-one thousand, ten".