10101011211220 has 48 divisors (see below), whose sum is σ = 21226275736848. Its totient is φ = 4037709772800.

The previous prime is 10101011211211. The next prime is 10101011211257. The reversal of 10101011211220 is 2211211010101.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5584043111364 + 4516968099856 = 2363058^2 + 2125316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10101011211220.

It is a congruent number.

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, 191233534 + ... + 191286346.

It is an arithmetic number, because the mean of its divisors is an integer number (442214077851).

Almost surely, 2^{10101011211220} is an apocalyptic number.

10101011211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101011211220 is an abundant number, since it is smaller than the sum of its proper divisors (11125264525628).

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

10101011211220 is a wasteful number, since it uses less digits than its factorization.

10101011211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59020 (or 59018 counting only the distinct ones).

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

Adding to 10101011211220 its reverse (2211211010101), we get a palindrome (12312222221321).

The spelling of 10101011211220 in words is "ten trillion, one hundred one billion, eleven million, two hundred eleven thousand, two hundred twenty".