1211021220022 has 4 divisors (see below), whose sum is σ = 1816531830036. Its totient is φ = 605510610010.

The previous prime is 1211021219999. The next prime is 1211021220023. The reversal of 1211021220022 is 2200221201121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1211021219978 and 1211021220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021220023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302755305004 + ... + 302755305007.

It is an arithmetic number, because the mean of its divisors is an integer number (454132957509).

Almost surely, 2^{1211021220022} is an apocalyptic number.

1211021220022 is a deficient number, since it is larger than the sum of its proper divisors (605510610014).

1211021220022 is an equidigital number, since it uses as much as digits as its factorization.

1211021220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605510610013.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211021220022 its reverse (2200221201121), we get a palindrome (3411242421143).

The spelling of 1211021220022 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, twenty-two".