1930121002 has 16 divisors (see below), whose sum is σ = 2967841800. Its totient is φ = 940872960.

The previous prime is 1930120987. The next prime is 1930121003. The reversal of 1930121002 is 2001210391.

It can be written as a sum of positive squares in 4 ways, for example, as 1434212641 + 495908361 = 37871^2 + 22269^2 .

It is a super-2 number, since 2×1930121002² = 7450734164722968008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1930121003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124624 + ... + 139252.

Almost surely, 2^1930121002 is an apocalyptic number.

1930121002 is a deficient number, since it is larger than the sum of its proper divisors (1037720798).

1930121002 is a wasteful number, since it uses less digits than its factorization.

1930121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16281.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1930121002 is about 43933.1424098026. The cubic root of 1930121002 is about 1245.0730863585.

Adding to 1930121002 its reverse (2001210391), we get a palindrome (3931331393).

The spelling of 1930121002 in words is "one billion, nine hundred thirty million, one hundred twenty-one thousand, two".