202102211121220 has 48 divisors (see below), whose sum is σ = 424541034918000. Its totient is φ = 80816813314560.

The previous prime is 202102211121133. The next prime is 202102211121269. The reversal of 202102211121220 is 22121112201202.

It can be written as a sum of positive squares in 8 ways, for example, as 10004606956036 + 192097604165184 = 3163006^2 + 13859928^2 .

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, 1006038946 + ... + 1006239814.

It is an arithmetic number, because the mean of its divisors is an integer number (8844604894125).

Almost surely, 2^{202102211121220} is an apocalyptic number.

202102211121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202102211121220 is an abundant number, since it is smaller than the sum of its proper divisors (222438823796780).

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

202102211121220 is a wasteful number, since it uses less digits than its factorization.

202102211121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215608 (or 215606 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202102211121220 its reverse (22121112201202), we get a palindrome (224223323322422).

The spelling of 202102211121220 in words is "two hundred two trillion, one hundred two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".