21001210021010 has 64 divisors (see below), whose sum is σ = 39829006990080. Its totient is φ = 7957525847040.

The previous prime is 21001210020983. The next prime is 21001210021037. The reversal of 21001210021010 is 1012001210012.

It is an interprime number because it is at equal distance from previous prime (21001210020983) and next prime (21001210021037).

It is a junction number, because it is equal to n+sod(n) for n = 21001210020982 and 21001210021000.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9537926 + ... + 11531454.

It is an arithmetic number, because the mean of its divisors is an integer number (622328234220).

Almost surely, 2^{21001210021010} is an apocalyptic number.

21001210021010 is a deficient number, since it is larger than the sum of its proper divisors (18827796969070).

21001210021010 is a wasteful number, since it uses less digits than its factorization.

21001210021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994003.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001210021010 its reverse (1012001210012), we get a palindrome (22013211231022).

The spelling of 21001210021010 in words is "twenty-one trillion, one billion, two hundred ten million, twenty-one thousand, ten".