2120920901 has 16 divisors (see below), whose sum is σ = 2451290688. Its totient is φ = 1813612800.

The previous prime is 2120920897. The next prime is 2120920909. The reversal of 2120920901 is 1090290212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2120920901 - 2² = 2120920897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120920909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597191 + ... + 600731.

It is an arithmetic number, because the mean of its divisors is an integer number (153205668).

Almost surely, 2^2120920901 is an apocalyptic number.

It is an amenable number.

2120920901 is a deficient number, since it is larger than the sum of its proper divisors (330369787).

2120920901 is a wasteful number, since it uses less digits than its factorization.

2120920901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2120920901 is about 46053.4569929338. The cubic root of 2120920901 is about 1284.8176399960.

The spelling of 2120920901 in words is "two billion, one hundred twenty million, nine hundred twenty thousand, nine hundred one".