1021211021110 has 64 divisors (see below), whose sum is σ = 2130809052672. Its totient is φ = 345129797376.

The previous prime is 1021211021081. The next prime is 1021211021111. The reversal of 1021211021110 is 111201121201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211021111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8746537 + ... + 8862523.

It is an arithmetic number, because the mean of its divisors is an integer number (33293891448).

Almost surely, 2^{1021211021110} is an apocalyptic number.

1021211021110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021211021110 is an abundant number, since it is smaller than the sum of its proper divisors (1109598031562).

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

1021211021110 is a wasteful number, since it uses less digits than its factorization.

1021211021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117797.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021211021110 its reverse (111201121201), we get a palindrome (1132412142311).

The spelling of 1021211021110 in words is "one trillion, twenty-one billion, two hundred eleven million, twenty-one thousand, one hundred ten".