101402021 has 18 divisors (see below), whose sum is σ = 120004038. Its totient is φ = 85433040.

The previous prime is 101402011. The next prime is 101402039. The reversal of 101402021 is 120204101.

It can be written as a sum of positive squares in only one way, i.e., 79405921 + 21996100 = 8911^2 + 4690^2 .

It is not a de Polignac number, because 101402021 - 2¹⁸ = 101139877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101401993 and 101402011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101402011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 219731 + ... + 220191.

It is an arithmetic number, because the mean of its divisors is an integer number (6666891).

Almost surely, 2^101402021 is an apocalyptic number.

It is an amenable number.

101402021 is a deficient number, since it is larger than the sum of its proper divisors (18602017).

101402021 is an frugal number, since it uses more digits than its factorization.

101402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 101402021 is about 10069.8570496308. The cubic root of 101402021 is about 466.3180257106.

Adding to 101402021 its reverse (120204101), we get a palindrome (221606122).

The spelling of 101402021 in words is "one hundred one million, four hundred two thousand, twenty-one".