1021001121210 has 64 divisors (see below), whose sum is σ = 2801726952192. Its totient is φ = 233266123776.

The previous prime is 1021001121197. The next prime is 1021001121253. The reversal of 1021001121210 is 121211001201.

It is a super-2 number, since 2×1021001121210² (a number of 25 digits) contains 22 as substring.

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, 633759 + ... + 1563218.

It is an arithmetic number, because the mean of its divisors is an integer number (43776983628).

Almost surely, 2^{1021001121210} is an apocalyptic number.

1021001121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021001121210 is an abundant number, since it is smaller than the sum of its proper divisors (1780725830982).

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

1021001121210 is a wasteful number, since it uses less digits than its factorization.

1021001121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199207.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021001121210 its reverse (121211001201), we get a palindrome (1142212122411).

The spelling of 1021001121210 in words is "one trillion, twenty-one billion, one million, one hundred twenty-one thousand, two hundred ten".