202220211211221 has 16 divisors (see below), whose sum is σ = 308512360396800. Its totient is φ = 115416677664048.

The previous prime is 202220211211181. The next prime is 202220211211231. The reversal of 202220211211221 is 122112112022202.

It is not a de Polignac number, because 202220211211221 - 2⁹ = 202220211210709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220211211231) 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, 5738679561 + ... + 5738714798.

It is an arithmetic number, because the mean of its divisors is an integer number (19282022524800).

Almost surely, 2^{202220211211221} is an apocalyptic number.

202220211211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202220211211221 is a deficient number, since it is larger than the sum of its proper divisors (106292149185579).

202220211211221 is a wasteful number, since it uses less digits than its factorization.

202220211211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11477395208.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 202220211211221 its reverse (122112112022202), we get a palindrome (324332323233423).

The spelling of 202220211211221 in words is "two hundred two trillion, two hundred twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-one".