1021111220210 has 16 divisors (see below), whose sum is σ = 1840780843992. Its totient is φ = 407826566400.

The previous prime is 1021111220177. The next prime is 1021111220231. The reversal of 1021111220210 is 120221111201.

It can be written as a sum of positive squares in 4 ways, for example, as 1020607083001 + 504137209 = 1010251^2 + 22453^2 .

It is a super-2 number, since 2×1021111220210² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77233271 + ... + 77246490.

Almost surely, 2^{1021111220210} is an apocalyptic number.

1021111220210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021111220210 is a deficient number, since it is larger than the sum of its proper divisors (819669623782).

1021111220210 is a wasteful number, since it uses less digits than its factorization.

1021111220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154480429.

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

Adding to 1021111220210 its reverse (120221111201), we get a palindrome (1141332331411).

The spelling of 1021111220210 in words is "one trillion, twenty-one billion, one hundred eleven million, two hundred twenty thousand, two hundred ten".