2121227572 has 12 divisors (see below), whose sum is σ = 3715901056. Its totient is φ = 1059541560.

The previous prime is 2121227557. The next prime is 2121227579. The reversal of 2121227572 is 2757221212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121227579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263598 + ... + 271525.

Almost surely, 2^2121227572 is an apocalyptic number.

It is an amenable number.

2121227572 is a deficient number, since it is larger than the sum of its proper divisors (1594673484).

2121227572 is a wasteful number, since it uses less digits than its factorization.

2121227572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536118 (or 536116 counting only the distinct ones).

The product of its digits is 7840, while the sum is 31.

The square root of 2121227572 is about 46056.7863837676. The cubic root of 2121227572 is about 1284.8795623621.

Adding to 2121227572 its reverse (2757221212), we get a palindrome (4878448784).

It can be divided in two parts, 21212 and 27572, that added together give a palindrome (48784).

The spelling of 2121227572 in words is "two billion, one hundred twenty-one million, two hundred twenty-seven thousand, five hundred seventy-two".