213203221022121 has 32 divisors (see below), whose sum is σ = 327189446868480. Its totient is φ = 122130622713600.

The previous prime is 213203221022059. The next prime is 213203221022131. The reversal of 213203221022121 is 121220122302312.

It is not a de Polignac number, because 213203221022121 - 2¹³ = 213203221013929 is a prime.

It is a super-2 number, since 2×213203221022121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213203221022091 and 213203221022100.

It is not an unprimeable number, because it can be changed into a prime (213203221022131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392380975 + ... + 392923956.

It is an arithmetic number, because the mean of its divisors is an integer number (10224670214640).

Almost surely, 2^{213203221022121} is an apocalyptic number.

It is an amenable number.

213203221022121 is a deficient number, since it is larger than the sum of its proper divisors (113986225846359).

213203221022121 is a wasteful number, since it uses less digits than its factorization.

213203221022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785305397.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 213203221022121 its reverse (121220122302312), we get a palindrome (334423343324433).

The spelling of 213203221022121 in words is "two hundred thirteen trillion, two hundred three billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-one".