2021111101210 has 32 divisors (see below), whose sum is σ = 3652416407952. Its totient is φ = 805241241600.

The previous prime is 2021111101199. The next prime is 2021111101211. The reversal of 2021111101210 is 121011111202.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 996041924361 + 1025069176849 = 998019^2 + 1012457^2 .

It is not an unprimeable number, because it can be changed into a prime (2021111101211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68606844 + ... + 68636296.

Almost surely, 2^{2021111101210} is an apocalyptic number.

2021111101210 is a deficient number, since it is larger than the sum of its proper divisors (1631305306742).

2021111101210 is a wasteful number, since it uses less digits than its factorization.

2021111101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56418.

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

Adding to 2021111101210 its reverse (121011111202), we get a palindrome (2142122212412).

The spelling of 2021111101210 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred one thousand, two hundred ten".