2121012010 has 16 divisors (see below), whose sum is σ = 4111500456. Its totient is φ = 783142848.

The previous prime is 2121011927. The next prime is 2121012031. The reversal of 2121012010 is 102101212.

It can be written as a sum of positive squares in 4 ways, for example, as 1173542049 + 947469961 = 34257^2 + 30781^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 8157609 + ... + 8157868.

Almost surely, 2^2121012010 is an apocalyptic number.

2121012010 is a deficient number, since it is larger than the sum of its proper divisors (1990488446).

2121012010 is a wasteful number, since it uses less digits than its factorization.

2121012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16315497.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2121012010 is about 46054.4461480105. The cubic root of 2121012010 is about 1284.8360371577.

Adding to 2121012010 its reverse (102101212), we get a palindrome (2223113222).

The spelling of 2121012010 in words is "two billion, one hundred twenty-one million, twelve thousand, ten".