20210201121 has 16 divisors (see below), whose sum is σ = 29526167808. Its totient is φ = 12194643600.

The previous prime is 20210201119. The next prime is 20210201147. The reversal of 20210201121 is 12110201202.

It is not a de Polignac number, because 20210201121 - 2¹ = 20210201119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20210201097 and 20210201106.

It is not an unprimeable number, because it can be changed into a prime (20210202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1341475 + ... + 1356456.

It is an arithmetic number, because the mean of its divisors is an integer number (1845385488).

Almost surely, 2^20210201121 is an apocalyptic number.

It is an amenable number.

20210201121 is a deficient number, since it is larger than the sum of its proper divisors (9315966687).

20210201121 is a wasteful number, since it uses less digits than its factorization.

20210201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698172.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20210201121 its reverse (12110201202), we get a palindrome (32320402323).

The spelling of 20210201121 in words is "twenty billion, two hundred ten million, two hundred one thousand, one hundred twenty-one".