221020001211210 has 32 divisors (see below), whose sum is σ = 530766208187712. Its totient is φ = 58903310847360.

The previous prime is 221020001211187. The next prime is 221020001211239. The reversal of 221020001211210 is 12112100020122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221020001211210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2209708051 + ... + 2209808070.

It is an arithmetic number, because the mean of its divisors is an integer number (16586444005866).

Almost surely, 2^{221020001211210} is an apocalyptic number.

221020001211210 is an abundant number, since it is smaller than the sum of its proper divisors (309746206976502).

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

221020001211210 is a wasteful number, since it uses less digits than its factorization.

221020001211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419517798.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221020001211210 its reverse (12112100020122), we get a palindrome (233132101231332).

The spelling of 221020001211210 in words is "two hundred twenty-one trillion, twenty billion, one million, two hundred eleven thousand, two hundred ten".