2121220023 has 8 divisors (see below), whose sum is σ = 3045854448. Its totient is φ = 1305366144.

The previous prime is 2121219977. The next prime is 2121220081. The reversal of 2121220023 is 3200221212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121220023 - 2⁸ = 2121219767 is a prime.

It is a super-2 number, since 2×2121220023² = 8999148771952241058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121219984 and 2121220011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27195090 + ... + 27195167.

It is an arithmetic number, because the mean of its divisors is an integer number (380731806).

Almost surely, 2^2121220023 is an apocalyptic number.

2121220023 is a deficient number, since it is larger than the sum of its proper divisors (924634425).

2121220023 is a wasteful number, since it uses less digits than its factorization.

2121220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54390273.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2121220023 is about 46056.7044305170. The cubic root of 2121220023 is about 1284.8780381555.

Adding to 2121220023 its reverse (3200221212), we get a palindrome (5321441235).

The spelling of 2121220023 in words is "two billion, one hundred twenty-one million, two hundred twenty thousand, twenty-three".