21203022030231 has 4 divisors (see below), whose sum is σ = 28270696040312. Its totient is φ = 14135348020152.

The previous prime is 21203022030199. The next prime is 21203022030251. The reversal of 21203022030231 is 13203022030212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21203022030231 - 2⁵ = 21203022030199 is a prime.

It is a super-2 number, since 2×21203022030231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21203022030198 and 21203022030207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203022030251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533837005036 + ... + 3533837005041.

It is an arithmetic number, because the mean of its divisors is an integer number (7067674010078).

Almost surely, 2^{21203022030231} is an apocalyptic number.

21203022030231 is a deficient number, since it is larger than the sum of its proper divisors (7067674010081).

21203022030231 is an equidigital number, since it uses as much as digits as its factorization.

21203022030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067674010080.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21203022030231 its reverse (13203022030212), we get a palindrome (34406044060443).

The spelling of 21203022030231 in words is "twenty-one trillion, two hundred three billion, twenty-two million, thirty thousand, two hundred thirty-one".