1021211553342 has 32 divisors (see below), whose sum is σ = 2092410188064. Its totient is φ = 332074035200.

The previous prime is 1021211553233. The next prime is 1021211553343. The reversal of 1021211553342 is 2433551121201.

It is a happy number.

It is a super-2 number, since 2×1021211553342² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211553343) 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, 2945488 + ... + 3273884.

It is an arithmetic number, because the mean of its divisors is an integer number (65387818377).

Almost surely, 2^{1021211553342} is an apocalyptic number.

1021211553342 is an abundant number, since it is smaller than the sum of its proper divisors (1071198634722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021211553342 is a wasteful number, since it uses less digits than its factorization.

1021211553342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341084.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1021211553342 its reverse (2433551121201), we get a palindrome (3454762674543).

The spelling of 1021211553342 in words is "one trillion, twenty-one billion, two hundred eleven million, five hundred fifty-three thousand, three hundred forty-two".