1202002021 has 12 divisors (see below), whose sum is σ = 1326156300. Its totient is φ = 1088637440.

The previous prime is 1202002007. The next prime is 1202002033.

1202002021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 429940225 + 772061796 = 20735^2 + 27786^2 .

It is not a de Polignac number, because 1202002021 - 2⁹ = 1202001509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202001989 and 1202002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202102021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14085 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (110513025).

Almost surely, 2^1202002021 is an apocalyptic number.

1202002021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1202002021 is a deficient number, since it is larger than the sum of its proper divisors (124154279).

1202002021 is a wasteful number, since it uses less digits than its factorization.

1202002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37220 (or 37209 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1202002021 is about 34669.9007930510. The cubic root of 1202002021 is about 1063.2492032791.

It can be divided in two parts, 120200 and 2021, that added together give a palindrome (122221).

The spelling of 1202002021 in words is "one billion, two hundred two million, two thousand, twenty-one".