2120155772 has 96 divisors (see below), whose sum is σ = 4442382336. Its totient is φ = 866764800.

The previous prime is 2120155769. The next prime is 2120155777. The reversal of 2120155772 is 2775510212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120155777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11100197 + ... + 11100387.

It is an arithmetic number, because the mean of its divisors is an integer number (46274816).

Almost surely, 2^2120155772 is an apocalyptic number.

It is an amenable number.

2120155772 is an abundant number, since it is smaller than the sum of its proper divisors (2322226564).

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

2120155772 is a wasteful number, since it uses less digits than its factorization.

2120155772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 2120155772 is about 46045.1492776384. The cubic root of 2120155772 is about 1284.6631207222.

Adding to 2120155772 its reverse (2775510212), we get a palindrome (4895665984).

The spelling of 2120155772 in words is "two billion, one hundred twenty million, one hundred fifty-five thousand, seven hundred seventy-two".