21121201021010 has 32 divisors (see below), whose sum is σ = 39685289807232. Its totient is φ = 8078269830400.

The previous prime is 21121201020937. The next prime is 21121201021021. The reversal of 21121201021010 is 1012010212112.

It is a super-2 number, since 2×21121201021010² (a number of 27 digits) contains 22 as substring.

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, 15748364 + ... + 17036823.

It is an arithmetic number, because the mean of its divisors is an integer number (1240165306476).

Almost surely, 2^{21121201021010} is an apocalyptic number.

21121201021010 is a deficient number, since it is larger than the sum of its proper divisors (18564088786222).

21121201021010 is a wasteful number, since it uses less digits than its factorization.

21121201021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32788018.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21121201021010 its reverse (1012010212112), we get a palindrome (22133211233122).

The spelling of 21121201021010 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, twenty-one thousand, ten".