20120222211220 has 24 divisors (see below), whose sum is σ = 42252555707208. Its totient is φ = 8048071920000.

The previous prime is 20120222211209. The next prime is 20120222211233. The reversal of 20120222211220 is 2211222202102.

It can be written as a sum of positive squares in 4 ways, for example, as 1886656085136 + 18233566126084 = 1373556^2 + 4270078^2 .

It is a congruent 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, 13627990 + ... + 15032050.

It is an arithmetic number, because the mean of its divisors is an integer number (1760523154467).

Almost surely, 2^{20120222211220} is an apocalyptic number.

20120222211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120222211220 is an abundant number, since it is smaller than the sum of its proper divisors (22132333495988).

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

20120222211220 is a wasteful number, since it uses less digits than its factorization.

20120222211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120571 (or 2120569 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20120222211220 its reverse (2211222202102), we get a palindrome (22331444413322).

The spelling of 20120222211220 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty".